High quality alloy material,easy clean,can be sterilized on high temperature. 
Sizes for choosen(XS-S-M-L) 
Buckle design,convenitent to wear 
Inner 6 magnets,effective blood circulation 
5pcs tooth bit,adjust size freely. 
"V" design,no easy fall off,Micturition refreshed
 
Note:
1. Must be worn in soften state
2. Must remove it before have a sex 
3. If have discomfort, stop using it 
4. If have frictional damage, stop using it 
 
Detail :

Material: Alloy
Color: Silver
Inner Diameter: 
S: 24-26 MM
M: 26-29 MM
L: 27-30 MM
XL: 29-32 MM
 
Included:

1 * Ring